User groups, group users views to AddRemoveView

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

mayan/apps/user_management/methods.py

@@ -9,6 +9,8 @@ from .events import (
     event_group_created, event_group_edited, event_user_created,
     event_user_edited
 )
+from .permissions import permission_group_view, permission_user_view
+from .querysets import get_user_queryset
 
 
 def get_method_group_save():
@@ -33,12 +35,82 @@ def get_method_group_save():
     return method_group_save
 
 
+def method_group_get_users(self, user, permission=permission_user_view):
+    AccessControlList = apps.get_model(
+        app_label='acls', model_name='AccessControlList'
+    )
+
+    return AccessControlList.objects.filter_by_access(
+        permission=permission, queryset=get_user_queryset().filter(
+            id__in=self.user_set.all()
+        ), user=user
+    )
+
+
+def method_group_users_add(self, queryset, _user):
+    with transaction.atomic():
+        event_group_edited.commit(
+            actor=_user, target=self
+        )
+        for user in queryset:
+            self.user_set.add(user)
+            event_user_edited.commit(
+                actor=_user, target=user
+            )
+
+
+def method_group_users_remove(self, queryset, _user):
+    with transaction.atomic():
+        event_group_edited.commit(
+            actor=_user, target=self
+        )
+        for user in queryset:
+            self.user_set.remove(user)
+            event_user_edited.commit(
+                actor=_user, target=user
+            )
+
+
 def method_user_get_absolute_url(self):
     return reverse(
         viewname='user_management:user_details', kwargs={'pk': self.pk}
     )
 
 
+def method_user_get_groups(self, user, permission=permission_group_view):
+    AccessControlList = apps.get_model(
+        app_label='acls', model_name='AccessControlList'
+    )
+
+    return AccessControlList.objects.filter_by_access(
+        permission=permission, queryset=self.groups.all(), user=user
+    )
+
+
+def method_user_groups_add(self, queryset, _user):
+    with transaction.atomic():
+        event_user_edited.commit(
+            actor=_user, target=self
+        )
+        for group in queryset:
+            self.groups.add(group)
+            event_group_edited.commit(
+                actor=_user, target=group
+            )
+
+
+def method_user_groups_remove(self, queryset, _user):
+    with transaction.atomic():
+        event_user_edited.commit(
+            actor=_user, target=self
+        )
+        for group in queryset:
+            self.groups.remove(group)
+            event_group_edited.commit(
+                actor=_user, target=group
+            )
+
+
 def get_method_user_save():
     user_save_original = get_user_model().save